Assessment of an ancient bridge combining geophysical and advanced photogrammetric methods: Application to the Pont De Coq, France

作者：Fauchard Cyrille^*; Antoine Raphael; Bretar Frederic; Lacogne Julien; Fargier Yannick; Maisonnave Cindy; Guilbert Vincent; Marjerie Pierre; Therain Paul Franck; Dupont Jean Paul; Pierrot Deseilligny Marc

来源：Journal of Applied Geophysics, 2013, 98: 100-112.

DOI：10.1016/j.jappgeo.2013.08.009

• Arch bridge
• Historical heritage
• Ground penetrating radar
• Electrical resistivity tomography
• Photogrammetry

A high resolution geophysical survey was carried out on the Pont De Coq, a medieval stone arch bridge located in Normandy (France) in 2011 and 2012. Two complementary methods are used: Electrical Resistivity Tomography (ERT) and Ground PenetratingRadar (GPR). They allow to evaluate the structural state of the bridge and to characterize the subsurface around and beneath the bridge. An excellent correlation is obtained between the geophysical methods and the geological data obtained around the bridge. In order to improve the restitution of the geophysical data, an advanced photogrammetric method is performed, providing a high resolution 3D Digital Terrain Model (DTM) of the Pont de Coq. The advanced photogrammetry enhances the presentation of the GPR and ERT data. This approach is an easy-to-use, rapid and cost-effective tool for stakeholders. Finally, it is a promising and original method for improved interpretations of future geophysical surveys.

• 出版日期2013-11